ISDN User Part Cause Location Parameter for the SIP Reason Header Field
RFC 8606, “ISDN User Part Cause Location Parameter for the SIP Reason Header Field”, is a Proposed Standard document published in June 2019 by R. Jesske. It updates RFC 3326. The canonical text is published by the RFC Editor.
Abstract
The SIP Reason header field is defined to carry ISUP (ISDN User Part) cause values as well as SIP response codes. Some services in SIP networks may need to know the ISUP location where the call was released in the PSTN (Public Switched Telephone Network) to correctly interpret the reason of release. This document updates RFC 3326 by adding a location parameter for this purpose.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 8606 is hosted at rfc-editor.org. Available in TXT,HTML.
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